Jake Beach Posted November 11, 2008 Report Share Posted November 11, 2008 (edited) After reading the article about the truvativ HammerSchmidt in the latest issue of MBUK ( issue 231) and reading that it could be ideal for single speed jump bikes making it 2 speed. Do you could we start using them on 26" and mabye even 20" trials bikes? You could run gears without having a mech to bust up.ThanksJake:) Edited November 11, 2008 by Jake Beach Quote Link to comment Share on other sites More sharing options...
manuel Posted November 11, 2008 Report Share Posted November 11, 2008 I think we are going to stick the ISO mount on the 24" Ashton/Diamondbacks so they can be run ... I cant wait for mine (think we have some samples on the way too) - 22:17 for trials then at a click its like 34:17 for the park or going super fast. single speed rear cog with a tensioner .... WINalso I didnt know until I played with one at cycle but its also a pretty insane freewheel - has loads of points in one of the gears and is almost instant engagement in the other so has the potential for running a fixed rear hub and getting some of the weight back. Quote Link to comment Share on other sites More sharing options...
Greetings Posted November 11, 2008 Report Share Posted November 11, 2008 22:17 for trialsYou run 22:17? Sorry for the OT, just interested. Quote Link to comment Share on other sites More sharing options...
Matthew_Gibson Posted November 11, 2008 Report Share Posted November 11, 2008 You run 22:17? Sorry for the OT, just interested.I ran that, when I had 'burns, was a little stiff for me. 22:18. pretty much the same as 18:15 Quote Link to comment Share on other sites More sharing options...
manuel Posted November 11, 2008 Report Share Posted November 11, 2008 You run 22:17? Sorry for the OT, just interested.I ran 22:18 on my stock ... which got dropped to 18:15 then on the 24 I have 18:14 (which is a shade light) so I guess 22:17 should be the gear of choice ? Quote Link to comment Share on other sites More sharing options...
Revolver Posted November 11, 2008 Report Share Posted November 11, 2008 Currently, the Hammerschmidt is ridiculously expensive..When I looked, it was £400. Quote Link to comment Share on other sites More sharing options...
manuel Posted November 11, 2008 Report Share Posted November 11, 2008 Currently, the Hammerschmidt is ridiculously expensive..When I looked, it was £400.Holy shit !! Quote Link to comment Share on other sites More sharing options...
Tom_ Posted November 11, 2008 Report Share Posted November 11, 2008 I guess you could think though, (if its any good) the price of a chris king, a pair of decent cranks, and a bash, as ultimatly thats what it could be replacing on your bike. Oh and possibly a gear setup.I guess you need to take into account a pro2 is cheaper etc.Anyone know how it works? Is it in anyway similar to current internally geared rear hubs? Quote Link to comment Share on other sites More sharing options...
manuel Posted November 11, 2008 Report Share Posted November 11, 2008 I guess you could think though, (if its any good) the price of a chris king, a pair of decent cranks, and a bash, as ultimatly thats what it could be replacing on your bike. Oh and possibly a gear setup.I guess you need to take into account a pro2 is cheaper etc.Anyone know how it works? Is it in anyway similar to current internally geared rear hubs?isnt it based around classic sturmey archer gear hubs ? I think i read that somewhere. there is an exploded view on the truvative website though Quote Link to comment Share on other sites More sharing options...
Tom_ Posted November 11, 2008 Report Share Posted November 11, 2008 Ahh yea, I see.Comes in 24:38or22:36 apparantlyIn the 22 tooth it turns the sprocket once per rotation, however in the "overdrive" it turns the sprocket 1.6 times per full crank rotation.Pretty clever. The sturmeny archers wernt up to much really, and engagment is apauling, but im guessing this will be far superior. Will be interesting to see it tested, and really put through its paces. At £400 a pop your gunna want it to last. Quote Link to comment Share on other sites More sharing options...
haydon_peter Posted November 11, 2008 Report Share Posted November 11, 2008 Here are a couple of videos showing how it works: Freecaster VideoMpora Dirt TV VideoIn both videos the bash is clear so you can see the internals. There are other videos on the internet if you have a look around but they are all very similar.I don't know the exact weights but the system isn't meant to be much heavier than a regular chain ring set-up.I'm not sure how happy I would be to bash it on the trials bike when messing up a move. For 'freeride' you are not going to bash the chain ring anywhere near as hard or often (seeing as your only really protecting the chain ring from rocks that might flick up off the trail and for the odd occation you might clip a log or rock)Not relevant for trials bikes but full suspension frames are going to have to be designed specifically around the Hammersmidt otherwise they will bob and have excessive pedal feedback. Quote Link to comment Share on other sites More sharing options...
manuel Posted November 11, 2008 Report Share Posted November 11, 2008 HB - "hit it on a rock - it'll take it" ... We will see .... Quote Link to comment Share on other sites More sharing options...
Tom_ Posted November 11, 2008 Report Share Posted November 11, 2008 (edited) Im impressed, looks like a good system. And it looks pretty sturdy to. I guess only time will tell.Rowan are you gunna be testing it? Edited November 11, 2008 by Tom_ Quote Link to comment Share on other sites More sharing options...
Jake Beach Posted November 11, 2008 Author Report Share Posted November 11, 2008 (edited) £400 is a bit pricey Edited November 11, 2008 by Jake Beach Quote Link to comment Share on other sites More sharing options...
mr kenny Posted November 11, 2008 Report Share Posted November 11, 2008 from what i have read and seen of the hammersmidt its a basic planitarium cog/ gear set= loads of engagments and feel due to there being 4 smaller cogs running round the larger ones- a bit like planets rotating roung the sun(lame desprition i know!)this is exactly the same as sturmey archer use in thier hubs...would you run a sturmey archer?nor me!rowan will be good to see how that goes(you might even have it when we ride together!)kenny Quote Link to comment Share on other sites More sharing options...
ZeroMatt Posted November 11, 2008 Report Share Posted November 11, 2008 Had a play on an all mountain bike with a set of these on recently and the shifting was great, not too sure on use with trials although it would be awsome if it doesn't die immedietly. Quote Link to comment Share on other sites More sharing options...
Mikee Posted November 11, 2008 Report Share Posted November 11, 2008 I would love to see this work well and be good for trials. It would be the ideal thing for my 24" bike! Quote Link to comment Share on other sites More sharing options...
Revolver Posted November 11, 2008 Report Share Posted November 11, 2008 What you're looking at here is something that would need to come with a lifetime warranty.£400, you don't want to be breaking it every six months.It could revolutionize trials! In the sense that, you could actually ride a trials bike to somewhere.Haha! Quote Link to comment Share on other sites More sharing options...
craigjames Posted November 11, 2008 Report Share Posted November 11, 2008 there's a few people making them, g-boxx, suntour, nc-17, all work on the same sort of planetary gear system. i wouldnt compare it to a sturmey, more to a rohloff as thats the level of quality. dont know what it would be like for trials use, cant imagine the internals would appreciate the bashing they'd get from some riders.......also i think the nc-17 version, which is licensed from another german manufacturer who has been making a similar product for hybrids for years now, uses a button where the crank bolt would be to shift rather than a shifter... seems pretty cool, less cables, less on your bars, better for streety trials? Quote Link to comment Share on other sites More sharing options...
Tom_ Posted November 11, 2008 Report Share Posted November 11, 2008 there's a few people making them, g-boxx, suntour, nc-17, all work on the same sort of planetary gear system. i wouldnt compare it to a sturmey, more to a rohloff as thats the level of quality. dont know what it would be like for trials use, cant imagine the internals would appreciate the bashing they'd get from some riders.......also i think the nc-17 version, which is licensed from another german manufacturer who has been making a similar product for hybrids for years now, uses a button where the crank bolt would be to shift rather than a shifter... seems pretty cool, less cables, less on your bars, better for streety trials?Youd blatantly end up accidentally shifting all the time though.I like the idea of minimlising the shifter bulk and position though. Quote Link to comment Share on other sites More sharing options...
Bionic Balls Posted November 12, 2008 Report Share Posted November 12, 2008 that's awesome....i really really really want this to work Quote Link to comment Share on other sites More sharing options...
blaze_ Posted November 12, 2008 Report Share Posted November 12, 2008 I didn't see what's so unique about the bottom bracket, Deng had the same design on the second model of the External BB...Would be great for a trials bike so you wouldn't have to make like a million revolutions to go to another spot...I kind of got pissed the other day when I had to go home from a very distant direction...good thing there are buses...Although I wouldn't trust the freewheel until it's tested by a trials rider. Quote Link to comment Share on other sites More sharing options...
Bionic Balls Posted November 12, 2008 Report Share Posted November 12, 2008 I kind of got pissed the other day when I had to go home from a very distant directionthat's the english way...stella oh..and braunschweig! Quote Link to comment Share on other sites More sharing options...
Rusevelt Posted November 12, 2008 Report Share Posted November 12, 2008 Looks revolutionary indeed. Shame truvativ didn't have one at the recent Cycle Show to try out, as it would prove an interesting test for street riders. Its only a matter of time before sponsored riders like Chris Smith, Aaron Chase, and Jeff Lenosky get their hands on one to test out for the relevant biking magazines and websites. Can't see it making any transistion to trials other riding quicker to your location or doing huge bmx style rolling gaps and launching up stuff (like that huge retaining wall that Akrigg tried to launch up a few years ago on his charge rig) Quote Link to comment Share on other sites More sharing options...
sstein Posted November 12, 2008 Report Share Posted November 12, 2008 I have to point ou that the system that the hammerschmidt uses would be OK when in trials gearing, but when in faster gearing there would be a substanial power loss, so although it would be faster to get from point to point it would not be the 36:17 that someone said, I reckon it would be more like a mid range street geaing (such as 32:16) when the power is drained. I may be wrong this is just what I have heard.Also in response to what a lot of people have said I see no reason why this would not handle the abuse of trials if it is well built and for £400 it should be. I think though that I will wait a couple of years until that have some of a better design at a lower price (if the idea takes off that is). Quote Link to comment Share on other sites More sharing options...
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